Heat recovery from concentrated sulfuric acid

Details Heat recovery from concentrated sulfuric acid Heat recovery from concentrated sulfuric acid

1986-09-19

1991-02-26

Straub, Gary P.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423531, 423532, 422160, 422161, 422240, 420453, 420 46, C17B 1798, C01B 1774, C01B 1748, C22C 3840

Patent

active

049960385

ABSTRACT:
A method and apparatus for the recovery of heat from a sulfuric acid process are provided. Sulfur trioxide is absorbed into hot concentrated sulfuric acid, acid having a concentration greater than 98% and less than 101% and a temperature greater than 120.degree. C., in a heat recovery tower and the heat created by the exothermic reaction is recovered in a useful form in a heat exchanger. Gas leaving the primary heat recovery absorption zone is cooled by contact with sulfuric acid in a secondary absorption and cooling zone located above the primary absorption zone in the tower.

REFERENCES:
patent: 3593497 (1981-07-01), Grimm et al.
patent: 3944401 (1976-03-01), Dorr et al.
patent: 4029751 (1977-06-01), Dorr et al.
patent: 4348373 (1982-09-01), Schoubye
patent: 4576813 (1986-03-01), McAlister et al.
patent: 4654205 (1987-03-01), Cameron
patent: 4654205 (1987-03-01), Cameron
patent: 4670242 (1987-06-01), McAlister et al.

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